All About Pocket Knives

Can anyone please help me ID this series of gerber knives as well as the production years.
I think they were 1st production Armorhide but I am not sure
The handles looks very much the same shape than the C series armorhide knives

The top knife has a 3 3/4 blade and 8 3/4 overall length
The second from the top has a 4 1/4 blade and 8 3/4 overall length
The second from botton is a Drop pint blade 3 1/8 blade 7 3/4 overall length
The bottom one is a game and fish blade 3 3/4 blade 8 1/4 overall length

The "C" series designed by Al Mar was never produced with "Armorhide" handles. The "C" series used green nylon in 1975 and 1976, ebony wood in 1977 and 1978, and stag in 1979 through the end of production in 1983.

In 1976 a similar series, also designed by Al Mar, made its appearance. That was the "A" series with "Armorhide" handles. The knives had a slightly different shaped handle with a lanyard hole, and were marked A325, A400, etc on the bottom of the handle.
The production knives also had slightly different blade shapes than the knives you pictured.

Since your knives appear to exhibit the "C" series handle shape and "Armorhide" as used on the "A" series, my best guess is that your knives are possibly prototypes for the "A" series.

Maybe the knives shown came after the C and A Series,